Pollen Punching (Alliance)

Pollen Punching quest can be started in Boralus Harbor from [npc=136096] herbalism trainer.
I was able to take it after ~150 level of profession skill.

You need to farm 12 [item=159957] from Siren' String herb nodes.
Can farm in any zone you want.
Recomended farm location is Drustvar forest near Fallhaven.
/way Drustvar 54.50 36.50 Farm in the forest near the Fallhaven
Siren' String can grow on any tree, so just farm in any forest.

Pollen Punching video: https://www.youtube.com/watch?v=SeOT1daWJVs

It is part of the Kul Tiran Herbalism quests. Full BfA Herbalism questchain is under the spoiler:

Spoiler

Alliance Herbalism BFA quests

Id

Quest

Skill

Rank

Questgiver

Zone

Video

1

Emergency Transplants

25-30

Riverbud Rank 2

[npc=136096]

Tiragarde Sound

https://youtu.be/oSsjkNtV4fA

2

Breaking The Food Chain

55-75

Riverbud Rank 3

[npc=136096]

Tiragarde Sound

https://youtu.be/_pbgJG1nY_Y

3

An Unusual Mentor

30

Akunda's Bite

[npc=136096]

Vol'dun

https://youtu.be/zTfyQjWnUSM

4

Foul Harvest

30

Akunda's Bite

[npc=137572]

Vol'dun

https://youtu.be/MiRJkGIpVYM

5

Giving Back to Nature

30

Akunda's Bite Rank 2

[npc=137572]

Vol'dun

https://youtu.be/2FCi7tpF1G0

6

What Happens Next

120

Akunda's Bite Rank 3

[item=160117]

Vol'dun

https://youtu.be/axzyHhPtSA0

7

Cultural Significance

25-30

Sea Stalk Rank 2

[npc=136096]

Boralus

https://youtu.be/90hS8fOJCFs

8

Gathering Mementos

80

Sea Stalk Rank 3

[npc=136096]

Tiragarde Sound

https://youtu.be/lQQvotx_QXg

9

Meet Sweetflower

50-55

Winter's Kiss

[npc=136096]

Drustvar

https://youtu.be/fL00DBVIygU

10

Can't Teach on an Empty Stomach

50-55

Winter's Kiss Rank 2

[npc=136269]

Drustvar

https://youtu.be/nM75AWMC63s

11

The Frigid Boon

80

Winter's Kiss Rank 3

[item=160064]

Drustvar *

https://youtu.be/ak9L078j6T4

12

Here In Spirit

35

Star Moss Rank 2

[npc=136096]

Tiragarde Sound *

https://youtu.be/nHC1yXnGSu0

13

Ghost Busting

55-75

Star Moss Rank 3

[npc=136096]

Boralus

https://youtu.be/5vVciMabpCE

14

Seeking More Knowledge

55-75

Anchor Weed Rank 2

[npc=136096]

Dungeon

https://youtu.be/fCphXXQNIVo

15

Enormous Anchor Pod

120

Anchor Weed

[item=160035]

Stormsong Valley

https://youtu.be/DtP9CGzuPq4

16

More Anchor Pods

150

Anchor Weed Rank 3

[npc=136096]

Stormsong Valley *

https://youtu.be/uDCz_U3vcVU

17

Aromatic Pollenator

50

Siren's Pollen

[item=159877]

Drustvar *

https://youtu.be/CYA4sljufxc

18

Learn From the Best

50

Siren's Pollen Rank 2

[npc=136096]

Stormsong Valley

https://youtu.be/Git1IB7deQk

19

Disgustingly Damp Flower

150

Siren's Pollen

[item=159956]

Drustvar *

https://youtu.be/p68uFY8BqpY

20

Pollen Punching

150

Siren's Pollen Rank 3

[npc=136096]

Drustvar *

https://youtu.be/SeOT1daWJVs

Skill column is approximate level you need to have to get this quest. It can be lower, i provide here info of level i was able to pick up the quest.
* Drop items can drop from related herb in multiple zones. Farm the herb in any zone you want. I provide the recommended zone.

Horde questchain has multiple quests with the same name, so can check here: Emergency Transplants

This quest is only obtainable by finding Disgustingly Damp Flower witch is dropping from siren's sting nodes. After i read this comments i was thinking the quest is bugged for me, i wrote the ticked and went to farm herbs in vol'dun. On my route i found siren's sting node and then bang item just dropped and i was able to pick up Pollen Punching quest